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/CakePHP 4.4

Class ConnectionManager

Manages and loads instances of Connection

Provides an interface to loading and creating connection objects. Acts as a registry for the connections defined in an application.

Provides an interface for loading and enumerating connections defined in config/app.php

Namespace: Cake\Datasource

Property Summary

  • $_aliasMap protected static
    array<string>

    A map of connection aliases.

  • $_config protected static
    array<string, mixed>

    Configuration sets.

  • $_dsnClassMap protected static
    array<string, string>

    An array mapping url schemes to fully qualified driver class names

  • $_registry protected static
    Cake\Datasource\ConnectionRegistry

    The ConnectionRegistry used by the manager.

Method Summary

  • alias() public static

    Set one or more connection aliases.

  • configured() public static

    Returns an array containing the named configurations

  • drop() public static

    Drops a constructed adapter.

  • dropAlias() public static

    Drop an alias.

  • get() public static

    Get a connection.

  • getConfig() public static

    Reads existing configuration.

  • getConfigOrFail() public static

    Reads existing configuration for a specific key.

  • getDsnClassMap() public static

    Returns the DSN class map for this class.

  • parseDsn() public static

    Parses a DSN into a valid connection configuration

  • setConfig() public static

    Configure a new connection object.

  • setDsnClassMap() public static

    Updates the DSN class map for this class.

Method Detail

alias() public static

alias(string $source, string $alias): void

Set one or more connection aliases.

Connection aliases allow you to rename active connections without overwriting the aliased connection. This is most useful in the test-suite for replacing connections with their test variant.

Defined aliases will take precedence over normal connection names. For example, if you alias 'default' to 'test', fetching 'default' will always return the 'test' connection as long as the alias is defined.

You can remove aliases with ConnectionManager::dropAlias().

Usage

// Make 'things' resolve to 'test_things' connection
ConnectionManager::alias('test_things', 'things');

Parameters

string $source

The existing connection to alias.

string $alias

The alias name that resolves to $source.

Returns

void

configured() public static

configured(): array<string>

Returns an array containing the named configurations

Returns

array<string>

drop() public static

drop(string $config): bool

Drops a constructed adapter.

If you wish to modify an existing configuration, you should drop it, change configuration and then re-add it.

If the implementing objects supports a $_registry object the named configuration will also be unloaded from the registry.

Parameters

string $config

An existing configuration you wish to remove.

Returns

bool

dropAlias() public static

dropAlias(string $alias): void

Drop an alias.

Removes an alias from ConnectionManager. Fetching the aliased connection may fail if there is no other connection with that name.

Parameters

string $alias

The connection alias to drop

Returns

void

get() public static

get(string $name, bool $useAliases = true): Cake\Datasource\ConnectionInterface

Get a connection.

If the connection has not been constructed an instance will be added to the registry. This method will use any aliases that have been defined. If you want the original unaliased connections pass false as second parameter.

Parameters

string $name

The connection name.

bool $useAliases optional

Set to false to not use aliased connections.

Returns

Cake\Datasource\ConnectionInterface

Throws

Cake\Datasource\Exception\MissingDatasourceConfigException
When config data is missing.

getConfig() public static

getConfig(string $key): mixed|null

Reads existing configuration.

Parameters

string $key

The name of the configuration.

Returns

mixed|null

getConfigOrFail() public static

getConfigOrFail(string $key): mixed

Reads existing configuration for a specific key.

The config value for this key must exist, it can never be null.

Parameters

string $key

The name of the configuration.

Returns

mixed

Throws

InvalidArgumentException
If value does not exist.

getDsnClassMap() public static

getDsnClassMap(): array<string, string>

Returns the DSN class map for this class.

Returns

array<string, string>

parseDsn() public static

parseDsn(string $config): array<string, mixed>

Parses a DSN into a valid connection configuration

This method allows setting a DSN using formatting similar to that used by PEAR::DB. The following is an example of its usage:

$dsn = 'mysql://user:pass@localhost/database';
$config = ConnectionManager::parseDsn($dsn);

$dsn = 'Cake\Database\Driver\Mysql://localhost:3306/database?className=Cake\Database\Connection';
$config = ConnectionManager::parseDsn($dsn);

$dsn = 'Cake\Database\Connection://localhost:3306/database?driver=Cake\Database\Driver\Mysql';
$config = ConnectionManager::parseDsn($dsn);

For all classes, the value of scheme is set as the value of both the className and driver unless they have been otherwise specified.

Note that query-string arguments are also parsed and set as values in the returned configuration.

Parameters

string $config

The DSN string to convert to a configuration array

Returns

array<string, mixed>

setConfig() public static

setConfig(array<string, mixed>|string $key, object|array<string, mixed>|null $config = null): void

Configure a new connection object.

The connection will not be constructed until it is first used.

Parameters

array<string, mixed>|string $key

The name of the connection config, or an array of multiple configs.

object|array<string, mixed>|null $config optional

An array of name => config data for adapter.

Returns

void

Throws

Cake\Core\Exception\CakeException
When trying to modify an existing config.

See Also

\Cake\Core\StaticConfigTrait::config()

setDsnClassMap() public static

setDsnClassMap(array<string, string> $map): void

Updates the DSN class map for this class.

Parameters

array<string, string> $map

Additions/edits to the class map to apply.

Returns

void

Property Detail

$_aliasMap protected static

A map of connection aliases.

Type

array<string>

$_config protected static

Configuration sets.

Type

array<string, mixed>

$_dsnClassMap protected static

An array mapping url schemes to fully qualified driver class names

Type

array<string, string>

$_registry protected static

The ConnectionRegistry used by the manager.

Type

Cake\Datasource\ConnectionRegistry

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https://api.cakephp.org/4.4/class-Cake.Datasource.ConnectionManager.html